JPH07267135A - Reinforcement structure of car body - Google Patents

Abstract

PURPOSE:To provide a reinforcement structure of a car body, by which the rigidity of an engine compartment part is increased so as to improve vibration noise characteristics, and the fitting accuracy of a bumper and a body is improved so as to improve the appearance of the front part of the car body. CONSTITUTION:A reinforcement structure of a car body is formed by connecting a body onto a chassis frame to be connected to the inside parts of right and left fender aprons 2a, 2b disposed on both sides of the front of the body, and a side reinforcing member 8 is provided extending in the longitudinal direction while forming a closed section structure in co-operation with the fender aprons 2a, 2b. The front end part of the side reinforcing member is connected to the chassis frame through a front body mount bracket 5. The rear end part of the side reinforcing member and a connecting member joined to the member are connected to the chassis frame through a rear body mount bracket.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle body reinforcement structure, and more particularly to a vehicle body reinforcement structure capable of increasing the rigidity of a front portion of a body forming an engine compartment.

[0002]

2. Description of the Related Art For example, in a so-called frame-equipped vehicle in which a body is connected to a chassis frame as described in Japanese Utility Model Laid-Open No. 63-14476, the body is a body mount bracket or rubber. It is connected to the chassis frame via a body mount member including an elastic member.

In the above vehicle with a frame, an engine compartment for accommodating an engine and the like is provided at the front of the body. In general, the engine compartment portion is divided into a vehicle compartment and an engine compartment portion and extends in the vehicle width direction, a pair of fender apron panels extending in the vehicle front-rear direction on both sides of the front portion of the body, and the fender apron. A radiator support panel extending in the vehicle width direction is provided at a front end portion of the panel, and is generally configured.

Body mount brackets are provided in the vicinity of the connecting portion between the pair of fender apron panels and the dash panel and radiator support panel. The front portion of the vehicle body is connected to the chassis frame via the body mount bracket and the body mount member.

[0005]

As described above, the front portion of the vehicle body, which constitutes the engine compartment portion, is connected to the chassis frame through the four body mount brackets on the left, right, front and rear. A cross member is provided in the vehicle width direction at the portion where the body mount bracket is provided, and is configured to increase the rigidity in the vicinity of the connecting portion.

However, the fender apron panel extending in the front-rear direction is formed of a thin plate material, and it cannot be said that the strength of the engine compartment is sufficiently secured.

Further, the body mount bracket itself is joined to the radiator support or the fender apron panel, and is not sufficient to enhance the rigidity of connecting the engine compartment to the chassis frame.

For this reason, the torsional rigidity of the engine compartment is low, which often causes a reduction in vibration noise characteristics and steering stability.

Further, a bumper is provided at the front end portion of the vehicle body in order to reduce the impact at the time of collision. The bumper is often supported by the front end portion of the chassis frame which is less deformed even when receiving an input, in order to improve the light collision performance.

However, the chassis frame and the body are connected to each other via a body mount member having a body mount rubber in order to reduce the transmission of vibrations to the vehicle body. For this reason, it is necessary to secure a certain gap between the body and the bumper in order to cope with a mounting error between the body and the chassis frame and elastic deformation of the body mount rubber or the like.

As a result, there is a problem that the accuracy of installation between the body and the bumper is reduced, and the appearance of the front part of the vehicle body is adversely affected.

The present invention has been devised under the above circumstances, and it is possible to solve the above-mentioned conventional problems, improve the rigidity of the engine compartment, and improve the vibration noise characteristics. It is an object of the present invention to provide a vehicle body reinforcing structure capable of improving the accuracy of assembling a bumper and a body and significantly improving the appearance of the front portion of the vehicle body.

[0013]

In order to solve the above problems, the present invention takes the following technical means.

That is, the invention described in claim 1 of the present application is a vehicle body reinforcement structure in which a body is connected to a chassis frame, and the inner portions of the left and right fender apron panels arranged on both sides of the front portion of the body. Respectively joined to
A side reinforcing member extending in the front-rear direction is provided while forming a closed cross-section structure in cooperation with these fender apron panels, and a front end of the side reinforcing member is connected to the chassis frame via a front body mount bracket. At the same time, a rear end of the side reinforcing member or a connecting member joined to the side reinforcing member is connected to the chassis frame via a rear body mount bracket.

The invention described in claim 2 of the present application is
Front cross members extending in the vehicle width direction are joined to the front ends of the left and right side reinforcing members in a bridging manner, and the front body mount brackets are provided near the connecting portions between these side reinforcing members and the front cross members. It is characterized by that.

Further, the invention described in claim 3 of the present application is
The front bumper is supported on the front end of the side reinforcing member.

[0017]

In the reinforcing structure for a vehicle body according to the present invention, side reinforcing members extending in the front-rear direction while forming a closed cross-section structure in cooperation with the left and right fender apron panels arranged on both sides of the front part of the body. Provide a member.

By providing the side reinforcing member, a closed cross-section structure extending in the front-rear direction is formed on both sides of the front part of the body, and the strength of the fender apron panel and the front part of the body is significantly improved.

Moreover, in the present invention, the front end portion and the rear end portion of the side reinforcing member are respectively connected to the chassis frame via the body mount bracket.

That is, in the present invention, the front and rear end portions of the closed cross-section structure extending in the front-rear direction on the left and right side portions of the vehicle body are connected to the chassis frame.

With the above structure, the torsional rigidity of the engine compartment is significantly improved. As a result, vibration and noise characteristics and steering stability are remarkably enhanced, and the strength of the fender apron panel itself is improved, so that the rough road durability performance is also significantly improved.

According to the second aspect of the present invention, the front cross member extending in the vehicle width direction is joined to the front ends of the left and right side reinforcing members in a bridging manner, and the side reinforcing members and the front cross member are joined together. The front body mount bracket is provided in the vicinity of the connecting portion of.

With the above structure, the force input from the chassis frame to the body via the body mount bracket can be dispersed and applied to the side reinforcing member and the cross member. Therefore, the impact force acting on the radiator support panel or the like can be significantly reduced. Therefore, it is possible to reduce the plate thickness of the radiator support panel, and it is not necessary to provide a special reinforcing structure in the engine compartment.

According to the third aspect of the present invention, the front bumper is supported on the front end of the side reinforcing member.

The side reinforcing member forms a closed cross-section structure which extends in the front-rear direction in cooperation with the fender apron panel. Therefore, by supporting the bumper on the front end of the side reinforcing member, the collision load is supported by the closed cross-section structure. Therefore, the deformation of the bumper at the time of a light collision is reduced, and the same light collision performance as that of the bumper supported on the chassis frame can be secured.

Further, a front cross member is provided between the front ends of the side reinforcing members, and a front body mount bracket is provided in the vicinity of these connecting portions so that a collision load can be prevented from being applied to the side reinforcing members and the front cross member. It can be distributed and act on the members. Thereby, the light collision performance can be further improved.

Moreover, the side reinforcing member is a reinforcing member provided on the body side. Therefore, the mounting accuracy between the bumper and the body can be improved, and the gap between the bumper and the body can be set small. For this reason,
Not only can the bumper installation accuracy be greatly improved, but the appearance of the front part of the vehicle body can be greatly improved.

[0028]

Description of Embodiments Embodiments according to the present invention will be specifically described below with reference to the drawings.

FIG. 1 is an overall perspective view of a front portion of a vehicle body provided with a reinforcing structure according to the present invention.

As shown in this figure, the engine compartment 1 of the body is joined to the front end portions of the fender apron panels 2a and 2b and the fender apron panels 2a and 2b which are arranged on both sides in the front-rear direction of the vehicle body. The radiator support panel 3 and the dash panel 4 joined to the rear end portions of the fender apron panels 2a and 2b are generally configured.

As shown in FIGS. 1 and 4, the fender apron panels 2a, 2b are bent inwardly at their lower middle portions, and have a space for accommodating the tire 30 at their outer portions.

As shown in FIGS. 1 and 3, the engine compartment portion 1 extends behind the dash panel 4 and a pair of front body mount brackets 5 and 5 provided on the front surface of the radiator support panel 3. It is connected to the chassis frame 7 via the connecting member 6 a and the rear body mount bracket 6 that are formed to extend.

In the engine compartment portion 1 according to this embodiment, the front and rear sides of the left and right fender apron panels 2a and 2b cooperate with the fender apron panels 2a and 2b to form a closed cross-section structure. Side reinforcing members 8 extending in the direction are provided. Below, Figure 1
The left side reinforcing structure will be described, but the right side reinforcing structure is also formed.

As shown in FIGS. 1 and 4, the side portion reinforcing member 8 has an intermediate portion formed in a substantially U-shaped cross-section, and the joint portions 9 and 9 provided on both side edge portions are the fenders. It is joined to the inner surface of the apron panel 2a by welding.

The side reinforcing member 8 is joined to the fender apron panel 2a while being deformed from a substantially U-shape to a substantially L-shape toward the front, and a front end portion thereof is provided on the radiator support panel 3. The opening 10 is projected forward.

At the front end of the side reinforcing member 8 which is projected from the radiator support panel 3, as shown in FIG. 2, a triangular pillar-shaped front reinforcing member 1 having an inclined surface opened.
1 is joined in a spanning manner between the L-shaped inner side surface of the side reinforcing member 8 and the front surface of the radiator support panel 3.

A front cross member 12 having a closed cross-section structure is provided in a bridging manner between the front ends of the left and right side reinforcing members 8 and 8, and the front cross member 12 is provided.
And front body mount brackets 5 and 5 are provided near the connecting portions of the side reinforcing members 8 and 8, respectively.

The front body mount bracket 5 is
As shown in FIG. 5, it is formed in a box shape with the upper and inner sides opened, and the back wall portion 5 a is joined to the inner side surface of the side reinforcing member 8.

As shown in FIG. 2, the front cross member 12 includes an upper member 15 and a lower member 16, which are joined so as to form a closed sectional structure.

At the upper ends of both ends of the front cross member 12, there are provided openings 17 which are formed by separating the upper member 15 and the lower member 16 from each other, and in the opening 17, the front body mount bracket 5 is provided. The lower part of is joined so that it is embedded.

The bottom of the front mount bracket 5 is
While being attached to the inner surface of the lower member 16 of the front cross member 12 and joined thereto, the widthwise end portions of the upper member 15 and the lower member 16 are the outer surface of the front body mount bracket 5 and the side reinforcing member. 8 and the inner surface of the front reinforcing member 11 are attached to each other, and the members are welded to each other.

A weld nut 19 is joined to the bottom wall portion 18 of the front body mount bracket 5.
The connecting bolt 21 extending from the mount member 23 provided on the chassis frame 7 is connected to the bolt insertion hole 2 provided in the lower member 16 of the front cross member 12.
Screwed to the weld nut 19 via the connector 0 to connect the chassis frame 7 and the engine compartment 1 to the body mount bracket 5 or the body mount member 2.
It is connected through 3.

In the reinforcing structure having the above-described structure, the side reinforcing member 8 is joined to the inner side of the fender apron panel 2a to form a closed cross-section structure extending in the front-rear direction of the vehicle body. Strength is dramatically improved.

Further, the torsional rigidity of the engine compartment portion 1 is significantly improved by providing the side reinforcing member 8 and the front cross member 12.
Therefore, vibration noise characteristics, steering stability, durability on rough roads, etc. are greatly improved.

Moreover, since the body mount bracket 5 is provided in the vicinity of the connecting portion between the side reinforcing member 8 and the front cross member 12, the force input from the chassis frame 7 is applied to the side reinforcing member 8 and the cross member. It is possible to disperse and act on 12.

Therefore, the thickness of the radiator support panel 3 and the like can be set small, and it is not necessary to separately provide a reinforcing member for increasing the rigidity. As a result, it is possible to reduce the manufacturing process and the manufacturing cost.

A front reinforcing member 11 is joined to the front end of the side reinforcing member 8 to reinforce it, and the side reinforcing member 8 and the front reinforcing member 11 are arranged in the vehicle width direction. The front cross member 12 is joined so as to be folded. Therefore, the strength in the vicinity of the front body mount bracket 5 is significantly improved. Therefore, the strength of the connecting portion with respect to the chassis frame 7 is greatly enhanced, and the durability on rough roads and the vibration and noise characteristics are further improved.

Further, as shown in FIG. 3, in the present invention, the bumper 24 is supported on the front end of the side reinforcing member 8.

In this embodiment, as shown in FIGS. 3 and 6, the back wall portion 5a of the front body mount bracket 5, the side reinforcing member 8 and the front reinforcing member 11 which are overlapped with each other are provided. Bolt insertion hole 2 that penetrates in the vehicle width direction
6 is provided, and weld nuts 27a and 27b are provided on the inner surface of the back wall portion of the front body mount bracket 8.

A bumper arm 25 extending rearward from the inside of the bumper 24 is attached to the outer surface of the front reinforcing member 11, and the front reinforcing member 11, the side reinforcing member 8 and the front body mount bracket are attached. 5, and the bumpers 24 are supported by the front end portions of the side reinforcing members 8 by jointly connecting them together by connecting bolts 28a and 28b.

Since the side reinforcing member 8 is a reinforcing member on the body side, as shown in FIG. 3, it is possible to improve the mounting accuracy between the bumper 24 and the body. Therefore, it is possible to set a small gap between the upper edge portion of the bumper 24 and the body, and the accuracy of the bumper 24 to be mounted on the body hardly becomes a problem.
Further, since the gap between the body and the bumper 24 becomes small, the appearance of the front part of the vehicle body is greatly improved.

Moreover, the bumper 24 is connected to the front ends of the side reinforcing members 8 and 8 which cooperate with the fender apron panels 2a and 2b to form a closed cross-section structure. The front body mount bracket 5 and the front cross member 12 are joined to the front end portions of the side reinforcing members 8 and 8. Therefore, the impact force input from the bumper 24 can be dispersed and applied not only to the side reinforcing member 8 but also to the chassis frame 7 or the front cross member 12. Therefore, the light collision performance can be further enhanced.

The scope of the present invention is not limited to the above embodiments.

In the embodiment, the side reinforcing member 8 having a substantially U-shaped cross section is provided. However, the cross sectional shape of the side reinforcing member is not limited to that of the embodiment, and the fender apron panels 2a and 2b may be used. Other shapes can be adopted as long as they can cooperate to form a closed cross-section structure.

Also, the front body mount bracket 5
Is provided so as to be sandwiched between the upper member 15 and the lower member 16 constituting the front cross member 12, but it may be provided near the connecting portion between the front cross member 12 and the side reinforcing member 8. The connection site of is not limited to the examples.

Further, in the embodiment, the front reinforcing member 11 is provided at the front end of the side reinforcing member 8, but the front reinforcing member 11 does not necessarily have to be provided, and the side reinforcing member 8 is not necessarily provided. The front cross member and the body mount bracket may be directly joined to the front end.

Further, in the embodiment, the bumper arm 25 is attached to the outer surface of the front reinforcing member 11 so that the side reinforcing member 8 and the front body mount bracket 5 are attached.
Along with this, the bolts are connected together in a tightening manner, but they may be connected directly to the side reinforcing member 8 or to the side reinforcing member 8 via the front body mount bracket 5.

Further, in the embodiment, the rear end of the side reinforcing member 8 is connected to the chassis frame 7 via the connecting member 22 and the rear body mount brackets 6 and 6. The reinforcing member 8 may be extended rearward and directly connected to the chassis frame 7.

[Brief description of drawings]

FIG. 1 is an overall perspective view of an engine compartment portion according to the present invention.

FIG. 2 is a perspective view showing a main part of FIG.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a sectional view taken along line IV-IV in FIG.

5 is a cross-sectional view taken along the line VV in FIG.

6 is a sectional view taken along line VI-VI in FIG.

[Explanation of symbols]

 1 Engine Compartment 2a, 2b Fender Apron Panel 5 Front Body Mount Bracket 6 Rear Body Mount Bracket 7 Chassis Frame 8 Side Reinforcement Member 12 Front Cross Member 22 Connecting Member

Claims (3)

[Claims] 1. A reinforcement structure for a vehicle body, comprising a body connected to a chassis frame, which is joined to the inner parts of left and right fender apron panels arranged on both sides of the front part of the body, together with these fender apron panels. A side reinforcing member extending in the front-rear direction while working to form a closed cross-section structure is provided, and a front end portion of the side reinforcing member is connected to the chassis frame via a front body mount bracket, and the side reinforcing member is also provided. A reinforcing structure for a vehicle body, characterized in that a rear end portion of the member or a connecting member joined thereto is connected to the chassis frame via a rear body mount bracket. 2. A front cross member extending in the vehicle width direction is joined to front ends of left and right side reinforcing members in a bridging manner, and the front part is provided in the vicinity of a connecting portion between these side reinforcing members and the front cross member. The vehicle body reinforcing structure according to claim 1, further comprising a body mount bracket. 3. The vehicle body reinforcing structure according to claim 1, wherein a front bumper is supported on a front end portion of the side reinforcing member.